"Spiritual intelligence is concerned with the inner life of mind & spirit and its relationship to being in the world. Spiritual intelligence implies a capacity for a deep understanding of existential questions and insight into multiple levels of consciousness. Spiritual intelligence also implies awareness of spirit as the ground of being or as the creative life force of evolution. If the evolution of life from stardust to mineral, vegetable, animal, and human existence implies some form of intelligence rather than being a purely random process, it might be called spiritual. Spiritual intelligence emerges as consciousness evolves into an ever-deepening awareness of matter, life, body, mind, soul, and spirit.
Spiritual intelligence, then, is more than individual mental ability. It appears to connect the personal to the transpersonal and the self to spirit. Spiritual intelligence goes beyond conventional psychological development. In addition to self-awareness, it implies awareness of our relationship to the transcendent, to each other, to the earth and all beings."
Vaughan F. What is Spiritual Intelligence? Journal of Humanistic Psychology, 2002; 42(2): 16-33.